High speed 3-D imaging through turbid media using photorefractive MQW devices

M. Itoh; Y. Gu; Z. Ansari; C. W. Dunsby; D. Parsons-Karavassilis; P. M. W. French; D. D. Nolte; M. R. Melloch

doi:10.1364/PEMD.2001.3

Photorefractive Effects, Materials, and Devices
OSA Trends in Optics and Photonics (Optica Publishing Group, 2001),
paper 3
•https://doi.org/10.1364/PEMD.2001.3

High speed 3-D imaging through turbid media using photorefractive MQW devices

M. Itoh, Y. Gu, Z. Ansari, C. W. Dunsby, D. Parsons-Karavassilis, P. M. W. French, D. D. Nolte, and M. R. Melloch

Photorefractive Effects, Materials, and Devices 2001

Delavan, Wisconsin United States
ISBN: 1-55752-693-1

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M. Itoh, Y. Gu, Z. Ansari, C. W. Dunsby, D. Parsons-Karavassilis, P. M. W. French, D. D. Nolte, and M. R. Melloch, "High speed 3-D imaging through turbid media using photorefractive MQW devices," in Photorefractive Effects, Materials, and Devices, G. Salamo and A. Siahmakoun, eds., Vol. 62 of OSA Trends in Optics and Photonics (Optica Publishing Group, 2001), paper 3.

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Abstract

Photorefractive holography can provide a whole-field coherence-gated 3-D imaging technique, applicable through turbid media, which offers a unique mechanism to discriminate against diffuse light. We demonstrate that, since all pixels are interrogated in parallel, it may be implemented at high frame rates as high as 462 frames/s using semi- insulating MQW devices and can utilize light sources of almost arbitrary spatial coherence, including low-cost LED's to achieve sub-5μm sectioning and high power broad stripe multi-mode diode lasers or fibre-coupled diode arrays that can provide several watts of average power with a spectral widths > 3 nm. We discuss design considerations for low coherence imaging configurations, including tilting the energy-fronts using appropriate prisms to compensate for walk-off when interfering low-coherence beams off- axis.

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